docs: def init_poolmanager(self, connections, maxsize, block=False, **pool_kwargs):
          """Called to initialize the HTTPAdapter when no proxy is used."""
          try:
              pool_kwargs['ssl_version'] = ssl.PROTOCOL_TLS
          except AttributeError:
              pool_kwargs['ssl_version'] = ssl.PROTOCOL_SSLv23
          return super(SSLAdapter, self).init_poolmanager(connections, maxsize, block, **pool_kwargs)